Poor service - No feedback - Cancelled without informing me

I had a Internet + Compaq contract with DSTV Multi choice for 2 years but one of the agent cancelled my contract within 3 months and me paying on time every month, the cancellation was done without my permission or even informing me. Later on according to the agent, she reactivated my internet a few days later and I got an sms from DSTV telling me that my internet was cancelled. It's now more than 4 months since I have been calling customer service, sometimes I can be on hold for 30 to 40 minutes waiting to come back to me until I hang up the call. I don't know what to do now because I'm sick and tired, it's looks like I'm the one who's begging them to accept my business and they do not need me as a customer. Wish somebody competent can call me and assist me because your agents are useless. If you cannot supply me with this service then rather lets part ways and you refund my monies to me.